 14.1: We sampled some pages of this book at random to see whether they he...
 14.2: A companys office of Human Resources reports a breakdown of employe...
 14.3: Remember our sample of pages in this book from the earlier Just Che...
 14.4: Think some more about that bag of Skittles described in the previou...
 14.5: Late to the train A student always catches his train if class ends ...
 14.6: Field goals A nervous kicker usually makes 70% of his first field g...
 14.7: Titanic On the Titanic, the probability of survival was 0.323. Amon...
 14.8: Births If the sex of a child is independent of all other births, is...
 14.9: Facebook Facebook reports that 70% of its users are from outside th...
 14.10: Online banking A national survey indicated that 30% of adults condu...
 14.11: Phones Recent research suggests that 73% of Americans have a home p...
 14.12: Travel Suppose the probability that a U.S. resident has traveled to...
 14.13: Amenities A check of dorm rooms on a large college campus revealed ...
 14.14: Workers Employment data at a large company reveal that 72% of the w...
 14.15: Global survey The marketing research organization GfK Custom Resear...
 14.16: Birth order A survey of students in a large Introductory Statistics...
 14.17: Cards You draw a card at random from a standard deck of 52 cards. F...
 14.18: Pets In its monthly report, the local animal shelter states that it...
 14.19: Health The probabilities that an adult American man has high blood ...
 14.20: Immigration The table shows the political affiliations of U.S. vote...
 14.21: Global survey, take 2 Look again at the table summarizing the Roper...
 14.22: Birth order, take 2 Look again at the data about birth order of Int...
 14.23: Sick kids Seventy percent of kids who visit a doctor have a fever, ...
 14.24: Sick cars Twenty percent of cars that are inspected have faulty pol...
 14.25: Cards You are dealt a hand of three cards, one at a time. Find the ...
 14.26: Another hand You pick three cards at random from a deck. Find the p...
 14.27: Batteries A junk box in your room contains a dozen old batteries, f...
 14.28: Shirts The soccer teams shirts have arrived in a big box, and peopl...
 14.29: Eligibility A university requires its biology majors to take a cour...
 14.30: Benefits Fiftysix percent of all American workers have a workplace...
 14.31: Cell phones in the home A survey found that 73% of Americans have a...
 14.32: On the road again According to Exercise 12, the probability that a ...
 14.33: Cards If you draw a card at random from a wellshuffled deck, is ge...
 14.34: Pets again The local animal shelter in Exercise 18 reported that it...
 14.35: Unsafe food Early in 2010, Consumer Reports published the results o...
 14.36: Birth order, finis In Exercises 16 and 22 we looked at the birth or...
 14.37: Mens health, again Given the table of probabilities from Exercise 1...
 14.38: Politics Given the table of probabilities from Exercise 20, are par...
 14.39: Phone service According to estimates from the federal governments 2...
 14.40: Snoring After surveying 995 adults, 81.5% of whom were over 30, the...
 14.41: Gender A 2009 poll conducted by Gallup classified respondents by se...
 14.42: Cars A random survey of autos parked in student and staff lots at a...
 14.43: Luggage Leah is flying from Boston to Denver with a connection in C...
 14.44: Graduation A private college report contains these statistics: 70% ...
 14.45: Late luggage Remember Leah (Exercise 43)? Suppose you pick her up a...
 14.46: Graduation, part II What percent of students who graduate from the ...
 14.47: Absenteeism A companys records indicate that on any given day about...
 14.48: Ereaders In 2011, 12% of Americans owned an electronic reader of s...
 14.49: Absenteeism, part II At the company described in Exercise 47, what ...
 14.50: Ereaders II Given the ereader data presented in Exercise 48, if a...
 14.51: Drunks Police often set up sobriety checkpoints roadblocks where dr...
 14.52: Noshows An airline offers discounted advancepurchase fares to cust...
 14.53: Dishwashers Dans Diner employs three dishwashers. Al washes 40% of ...
 14.54: Parts A company manufacturing electronic components for home entert...
 14.55: HIV testing In July 2005 the journal Annals of Internal Medicine pu...
 14.56: Polygraphs Lie detectors are controversial instruments, barred from...
Solutions for Chapter 14: Probability Rules!
Full solutions for Stats Modeling the World  4th Edition
ISBN: 9780321854018
Solutions for Chapter 14: Probability Rules!
Get Full SolutionsThis textbook survival guide was created for the textbook: Stats Modeling the World, edition: 4. Chapter 14: Probability Rules! includes 56 full stepbystep solutions. This expansive textbook survival guide covers the following chapters and their solutions. Since 56 problems in chapter 14: Probability Rules! have been answered, more than 58166 students have viewed full stepbystep solutions from this chapter. Stats Modeling the World was written by and is associated to the ISBN: 9780321854018.

aerror (or arisk)
In hypothesis testing, an error incurred by failing to reject a null hypothesis when it is actually false (also called a type II error).

Acceptance region
In hypothesis testing, a region in the sample space of the test statistic such that if the test statistic falls within it, the null hypothesis cannot be rejected. This terminology is used because rejection of H0 is always a strong conclusion and acceptance of H0 is generally a weak conclusion

Average run length, or ARL
The average number of samples taken in a process monitoring or inspection scheme until the scheme signals that the process is operating at a level different from the level in which it began.

Biased estimator
Unbiased estimator.

Box plot (or box and whisker plot)
A graphical display of data in which the box contains the middle 50% of the data (the interquartile range) with the median dividing it, and the whiskers extend to the smallest and largest values (or some deined lower and upper limits).

Center line
A horizontal line on a control chart at the value that estimates the mean of the statistic plotted on the chart. See Control chart.

Coeficient of determination
See R 2 .

Conidence level
Another term for the conidence coeficient.

Continuous distribution
A probability distribution for a continuous random variable.

Correction factor
A term used for the quantity ( / )( ) 1 1 2 n xi i n ? = that is subtracted from xi i n 2 ? =1 to give the corrected sum of squares deined as (/ ) ( ) 1 1 2 n xx i x i n ? = i ? . The correction factor can also be written as nx 2 .

Covariance
A measure of association between two random variables obtained as the expected value of the product of the two random variables around their means; that is, Cov(X Y, ) [( )( )] =? ? E X Y ? ? X Y .

Dependent variable
The response variable in regression or a designed experiment.

Event
A subset of a sample space.

F distribution.
The distribution of the random variable deined as the ratio of two independent chisquare random variables, each divided by its number of degrees of freedom.

Ftest
Any test of signiicance involving the F distribution. The most common Ftests are (1) testing hypotheses about the variances or standard deviations of two independent normal distributions, (2) testing hypotheses about treatment means or variance components in the analysis of variance, and (3) testing signiicance of regression or tests on subsets of parameters in a regression model.

Fisherâ€™s least signiicant difference (LSD) method
A series of pairwise hypothesis tests of treatment means in an experiment to determine which means differ.

Gamma random variable
A random variable that generalizes an Erlang random variable to noninteger values of the parameter r

Generating function
A function that is used to determine properties of the probability distribution of a random variable. See Momentgenerating function

Geometric random variable
A discrete random variable that is the number of Bernoulli trials until a success occurs.

Goodness of fit
In general, the agreement of a set of observed values and a set of theoretical values that depend on some hypothesis. The term is often used in itting a theoretical distribution to a set of observations.